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Diffstat (limited to 'arch/mips/kvm/kvm_mips_int.c')
-rw-r--r--arch/mips/kvm/kvm_mips_int.c243
1 files changed, 0 insertions, 243 deletions
diff --git a/arch/mips/kvm/kvm_mips_int.c b/arch/mips/kvm/kvm_mips_int.c
deleted file mode 100644
index 1e5de16afe29..000000000000
--- a/arch/mips/kvm/kvm_mips_int.c
+++ /dev/null
@@ -1,243 +0,0 @@
-/*
-* This file is subject to the terms and conditions of the GNU General Public
-* License. See the file "COPYING" in the main directory of this archive
-* for more details.
-*
-* KVM/MIPS: Interrupt delivery
-*
-* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
-* Authors: Sanjay Lal <sanjayl@kymasys.com>
-*/
-
-#include <linux/errno.h>
-#include <linux/err.h>
-#include <linux/module.h>
-#include <linux/vmalloc.h>
-#include <linux/fs.h>
-#include <linux/bootmem.h>
-#include <asm/page.h>
-#include <asm/cacheflush.h>
-
-#include <linux/kvm_host.h>
-
-#include "kvm_mips_int.h"
-
-void kvm_mips_queue_irq(struct kvm_vcpu *vcpu, uint32_t priority)
-{
- set_bit(priority, &vcpu->arch.pending_exceptions);
-}
-
-void kvm_mips_dequeue_irq(struct kvm_vcpu *vcpu, uint32_t priority)
-{
- clear_bit(priority, &vcpu->arch.pending_exceptions);
-}
-
-void kvm_mips_queue_timer_int_cb(struct kvm_vcpu *vcpu)
-{
- /* Cause bits to reflect the pending timer interrupt,
- * the EXC code will be set when we are actually
- * delivering the interrupt:
- */
- kvm_set_c0_guest_cause(vcpu->arch.cop0, (C_IRQ5 | C_TI));
-
- /* Queue up an INT exception for the core */
- kvm_mips_queue_irq(vcpu, MIPS_EXC_INT_TIMER);
-
-}
-
-void kvm_mips_dequeue_timer_int_cb(struct kvm_vcpu *vcpu)
-{
- kvm_clear_c0_guest_cause(vcpu->arch.cop0, (C_IRQ5 | C_TI));
- kvm_mips_dequeue_irq(vcpu, MIPS_EXC_INT_TIMER);
-}
-
-void
-kvm_mips_queue_io_int_cb(struct kvm_vcpu *vcpu, struct kvm_mips_interrupt *irq)
-{
- int intr = (int)irq->irq;
-
- /* Cause bits to reflect the pending IO interrupt,
- * the EXC code will be set when we are actually
- * delivering the interrupt:
- */
- switch (intr) {
- case 2:
- kvm_set_c0_guest_cause(vcpu->arch.cop0, (C_IRQ0));
- /* Queue up an INT exception for the core */
- kvm_mips_queue_irq(vcpu, MIPS_EXC_INT_IO);
- break;
-
- case 3:
- kvm_set_c0_guest_cause(vcpu->arch.cop0, (C_IRQ1));
- kvm_mips_queue_irq(vcpu, MIPS_EXC_INT_IPI_1);
- break;
-
- case 4:
- kvm_set_c0_guest_cause(vcpu->arch.cop0, (C_IRQ2));
- kvm_mips_queue_irq(vcpu, MIPS_EXC_INT_IPI_2);
- break;
-
- default:
- break;
- }
-
-}
-
-void
-kvm_mips_dequeue_io_int_cb(struct kvm_vcpu *vcpu,
- struct kvm_mips_interrupt *irq)
-{
- int intr = (int)irq->irq;
- switch (intr) {
- case -2:
- kvm_clear_c0_guest_cause(vcpu->arch.cop0, (C_IRQ0));
- kvm_mips_dequeue_irq(vcpu, MIPS_EXC_INT_IO);
- break;
-
- case -3:
- kvm_clear_c0_guest_cause(vcpu->arch.cop0, (C_IRQ1));
- kvm_mips_dequeue_irq(vcpu, MIPS_EXC_INT_IPI_1);
- break;
-
- case -4:
- kvm_clear_c0_guest_cause(vcpu->arch.cop0, (C_IRQ2));
- kvm_mips_dequeue_irq(vcpu, MIPS_EXC_INT_IPI_2);
- break;
-
- default:
- break;
- }
-
-}
-
-/* Deliver the interrupt of the corresponding priority, if possible. */
-int
-kvm_mips_irq_deliver_cb(struct kvm_vcpu *vcpu, unsigned int priority,
- uint32_t cause)
-{
- int allowed = 0;
- uint32_t exccode;
-
- struct kvm_vcpu_arch *arch = &vcpu->arch;
- struct mips_coproc *cop0 = vcpu->arch.cop0;
-
- switch (priority) {
- case MIPS_EXC_INT_TIMER:
- if ((kvm_read_c0_guest_status(cop0) & ST0_IE)
- && (!(kvm_read_c0_guest_status(cop0) & (ST0_EXL | ST0_ERL)))
- && (kvm_read_c0_guest_status(cop0) & IE_IRQ5)) {
- allowed = 1;
- exccode = T_INT;
- }
- break;
-
- case MIPS_EXC_INT_IO:
- if ((kvm_read_c0_guest_status(cop0) & ST0_IE)
- && (!(kvm_read_c0_guest_status(cop0) & (ST0_EXL | ST0_ERL)))
- && (kvm_read_c0_guest_status(cop0) & IE_IRQ0)) {
- allowed = 1;
- exccode = T_INT;
- }
- break;
-
- case MIPS_EXC_INT_IPI_1:
- if ((kvm_read_c0_guest_status(cop0) & ST0_IE)
- && (!(kvm_read_c0_guest_status(cop0) & (ST0_EXL | ST0_ERL)))
- && (kvm_read_c0_guest_status(cop0) & IE_IRQ1)) {
- allowed = 1;
- exccode = T_INT;
- }
- break;
-
- case MIPS_EXC_INT_IPI_2:
- if ((kvm_read_c0_guest_status(cop0) & ST0_IE)
- && (!(kvm_read_c0_guest_status(cop0) & (ST0_EXL | ST0_ERL)))
- && (kvm_read_c0_guest_status(cop0) & IE_IRQ2)) {
- allowed = 1;
- exccode = T_INT;
- }
- break;
-
- default:
- break;
- }
-
- /* Are we allowed to deliver the interrupt ??? */
- if (allowed) {
-
- if ((kvm_read_c0_guest_status(cop0) & ST0_EXL) == 0) {
- /* save old pc */
- kvm_write_c0_guest_epc(cop0, arch->pc);
- kvm_set_c0_guest_status(cop0, ST0_EXL);
-
- if (cause & CAUSEF_BD)
- kvm_set_c0_guest_cause(cop0, CAUSEF_BD);
- else
- kvm_clear_c0_guest_cause(cop0, CAUSEF_BD);
-
- kvm_debug("Delivering INT @ pc %#lx\n", arch->pc);
-
- } else
- kvm_err("Trying to deliver interrupt when EXL is already set\n");
-
- kvm_change_c0_guest_cause(cop0, CAUSEF_EXCCODE,
- (exccode << CAUSEB_EXCCODE));
-
- /* XXXSL Set PC to the interrupt exception entry point */
- if (kvm_read_c0_guest_cause(cop0) & CAUSEF_IV)
- arch->pc = KVM_GUEST_KSEG0 + 0x200;
- else
- arch->pc = KVM_GUEST_KSEG0 + 0x180;
-
- clear_bit(priority, &vcpu->arch.pending_exceptions);
- }
-
- return allowed;
-}
-
-int
-kvm_mips_irq_clear_cb(struct kvm_vcpu *vcpu, unsigned int priority,
- uint32_t cause)
-{
- return 1;
-}
-
-void kvm_mips_deliver_interrupts(struct kvm_vcpu *vcpu, uint32_t cause)
-{
- unsigned long *pending = &vcpu->arch.pending_exceptions;
- unsigned long *pending_clr = &vcpu->arch.pending_exceptions_clr;
- unsigned int priority;
-
- if (!(*pending) && !(*pending_clr))
- return;
-
- priority = __ffs(*pending_clr);
- while (priority <= MIPS_EXC_MAX) {
- if (kvm_mips_callbacks->irq_clear(vcpu, priority, cause)) {
- if (!KVM_MIPS_IRQ_CLEAR_ALL_AT_ONCE)
- break;
- }
-
- priority = find_next_bit(pending_clr,
- BITS_PER_BYTE * sizeof(*pending_clr),
- priority + 1);
- }
-
- priority = __ffs(*pending);
- while (priority <= MIPS_EXC_MAX) {
- if (kvm_mips_callbacks->irq_deliver(vcpu, priority, cause)) {
- if (!KVM_MIPS_IRQ_DELIVER_ALL_AT_ONCE)
- break;
- }
-
- priority = find_next_bit(pending,
- BITS_PER_BYTE * sizeof(*pending),
- priority + 1);
- }
-
-}
-
-int kvm_mips_pending_timer(struct kvm_vcpu *vcpu)
-{
- return test_bit(MIPS_EXC_INT_TIMER, &vcpu->arch.pending_exceptions);
-}
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